Patents by Inventor Easwar Magesan

Easwar Magesan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • OPTIMIZING PHYSICAL PARAMETERS IN FAULT-TOLERANT QUANTUM COMPUTING TO REDUCE FREQUENCY CROWDING
    Publication number: 20180285761
    Abstract: A technique relates to quantum error correction. Code qubits are configured as target qubits, and the code qubits have a first dephasing time and a first anharmonicity. Syndrome qubits are configured as control qubits, and the syndrome qubits have a second dephasing time and a second anharmonicity. The target qubits and the control qubits are configured to form one or more controlled not (CNOT) gates. The first dephasing time is greater than the second dephasing time and the second anharmonicity is greater than the first anharmonicity.
    Type: Application
    Filed: February 14, 2018
    Publication date: October 4, 2018
    Inventors: Jay M. GAMBETTA, Easwar MAGESAN
  • WEAKLY TUNABLE QUBIT BASED ON TWO COUPLED DISPARATE TRANSMONS
    Publication number: 20180260729
    Abstract: A technique relates to providing a superconducting quantum device. A fixed frequency transmon qubit is provided. A tunable frequency transmon qubit is provided. The fixed frequency transmon qubit is coupled to the tunable frequency transmon qubit to form a single qubit.
    Type: Application
    Filed: March 7, 2017
    Publication date: September 13, 2018
    Inventors: Baleegh Abdo, Jay Gambetta, Jared B. Hertzberg, Easwar Magesan
  • Procedure for Systematic Tune Up of Crosstalk in a Cross-Resonance Gate and System Performing the Procedure and Using Results of the Same
    Publication number: 20180225586
    Abstract: In a system including a cross-resonance gate having a superconducting control qubit and having a superconducting target qubit coupled through a bus resonator, echo pulses are generated at a first frequency and directed to the control qubit, wherein the first frequency is on resonance with the control qubit. Cross-resonance pulses are generated at a second frequency on resonance with the target qubit and applied to the control qubit, wherein the generating and applying the cross-resonance pulses induce rotations on the target qubit through an interaction that is mediated by the bus resonator. Cancellation pulses are generated at the second frequency and applied to the target qubit. Sets of Hamiltonian tomographies may be measured to determine appropriate amplitudes and phases of the cross-resonance and cancellation pulses.
    Type: Application
    Filed: March 10, 2017
    Publication date: August 9, 2018
    Inventors: Jerry M. Chow, Jay M. GAMBETTA, Easwar MAGESAN, Sarah E. SHELDON
  • Optimizing physical parameters in fault-tolerant quantum computing to reduce frequency crowding
    Patent number: 9978020
    Abstract: A technique relates to quantum error correction. Code qubits are configured as target qubits, and the code qubits have a first dephasing time and a first anharmonicity. Syndrome qubits are configured as control qubits, and the syndrome qubits have a second dephasing time and a second anharmonicity. The target qubits and the control qubits are configured to form one or more controlled not (CNOT) gates. The first dephasing time is greater than the second dephasing time and the second anharmonicity is greater than the first anharmonicity.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: May 22, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Jay M. Gambetta, Easwar Magesan